Run results for: Javascript classList.contains vs element.matches

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

classList

360K/s

matches

7K/s

View exact numbers

Test name	Executions per second
✓ classList	359,931 Ops/sec
matches	6,611 Ops/sec

HTML Preparation code:

<div class="foo bar"></div>

Tests:

matches
const element = document.querySelector('.foo'); var i = 1000; while (i--) { element.matches(".foo.bar"); }
classList
const element = document.querySelector('.foo'); var i = 1000; while (i--) { element.classList.contains('foo') && element.classList.contains('bar'); }